Self-cleaning filter.



VF.E.PENDLETON.

SELF CLEANING FILTER. APPLICATION FILED APB.2, 1908.

1,062,793.. I I Patented May 27,1913v 2 SHEETS-SHEET l.

W4M- vzzwbw F. E. PENDLETON. SELF GLEANING FILTER.

APBLIGATION FILED APR.2,'1 908.

Patented May 27, 1913.

2 EHEETS-SHEET 2 WITNESSES FRANK E. PENDLETON, or MonroLAIn, NEW JERSEY.

SELF-CLEANING FILTER.

Specification of Letters Patent.

Application filed April 2, 1908. Serial No. 424,687.

T 0 all whom it may concern Be it known that I, FRANK E. PENDLETON, acitizen of the United States, and a resident of Montclair, .Essexcounty, and State of New Jersey, have invented certain new and usefulImprovements in Self-CleaningFilters, of which the following is aspecification.

My invention relates to filters and has for its object to provide meansfor use in a line of water pipe to. separate sand, gravel or any othersolid material from the water passing through the pipe.

The device is so constructed that it is simple in operation, thoroughlyreliable and may be easily taken apart for cleaning. The

" parts are also so constructed and arranged that the inner surface ofthe screen is kept clean by the fiow of water and the suspended materialis separated from the water by the greater weight and sudden change inthe direction of the flow of water.

While the device is specially adapted for separation of sand or othermaterial from water passing through the pipe, it is to be understoodthat it is not tov be confined to this use, as it may be used also as afilter to Separate dust, sand or any other material carried by anyliquid, fluid or gas.

The invent-ion is illustrated in the accompanying drawings forming apart of this application, in which:

Figure 1 is a longitudinal vertical section of the apparatus. Fig. 2 isa section on line 2 of Fig. 1. Fig. 3 is a section on line 3 of Fig. 1.Fig. 4c, is a longitudinal section of a modification. Fig. 5 is asection of a detail. Fig. 6 is a perspective view of one form of thescreen or filter used-in my apparatus. Fig. 7 is a modification.

Referring to the drawings in which the same reference characterindicates the same part in the several views: the part marked Arepresents a casing which may be made of cast iron, brass, or any othersuitable material. This casing is provided with screwthreaded openings aa a and a. To the Patented May 27, 1913.

vided withanother'opening b for a purpose to be hereinafter described.

C is a trap consisting of a short length of.

pipe or casting having one end 0 reduced and screw-threaded to receive ablow-off cock D. The wall of this pipe near its opposite end is cut awayto form the openings 0 Fitted inside of this pipe and covering theopenings is a screen E, preferably made of perforated metal, although insome cases wire mesh or other suitable material may be used. Theexterior of the'pipe or casting isv provided with screw-threads whichfit into the screw-threadedopenings a of the casing with its inner endin the recess 6 of the wall B. The parts are so constructed and fittedthat the opening I) in this wall communicates with the inside of thetrap C, and the openings 0 in the wall of the tra preferably extend fromthe screw-threads opening a in the casing to the wall B. The trap isarranged at about an angle of 45 to the opening a so that the device canbe used equally well in a vertical or horizontal position, and therelative arrangement of the wall and the trap is such that the waterassing through is suddenly changed in direction, causing a whirl orrotation in the water so that the sand, gravel or other solid materialheavier than the water will be thrown to the bottom of the trap, whichthereby forms a pocket C and thewater flowing in the direction of thetrap will impinge upon the inside of the screen and scour the same tokeep it clean and free so that the water can readily pass through itWhile the openings 0 are shown rectangular, they may be any other shape.The screen E which covers these openings 0 is shown as extending fromthe pocket C to the wall-opening Z) and as being clamped between ashoulder formed by the recess 12- and a shoulder b" formed in the trapand surrounding the mouth of the pocket. Screw-threaded in the opening 6of the wall B is a valve seat F.

G is a relief valve which is held to this seat F by a spiral spring Hone, end of which rests against the back of the valve and the otherrests against the under side of the cap J which is screw-threaded in theopening a This cap has an inwardly projecting lug 7' with a recess jtherein into which fits the outer stem 9 of the valve. As shown, thespring surrounds the lug 7' and the valve stem The other side of thevalve is provided with another stem 9 '2 through the trap firstCompartment which projects through an opening 70 in the diaphragm K.This diaphragm is thickened at the center at 10 as shown, to strengthenthe same and also to give a proper bearing for the valve stem 9 Thisvalve, it is seen, projects at substantially right angles from that partof the wall in which is the opening Z2 and the outer edge of thisdiaphragm is curved at 70 so that its greatest area is adjacent to thewall 13, as more clearly shown in Fig. 2 of the drawing. By making thediaphragm this shape it covers the full area of the projected stream ofwater and no more, leaving as large an opening as possible around it forthe flow of water when the valve is unseated. This diaphragm acts as abafile to hold back the sediment carried by the water,

and it prevents the same from lodging under the relief valve. Thissediment, if not held back, would in course of time clog under therelief valve and prevent the same from freely opening. As shown, thevalve is arranged .at an angle of about 45 to the inlet opening 11 Thispermits a more compact construction and lessens the resistance to theflow of water when the valve is unseated.

The operation of the apparatus is as follows: \Vater being forcedthrough the opening a with the valve seated will enter the compartment1, pass into the trap C and through the screen into the compartment 2,and out through the opening a through a pipe not shown. Any sand orother material to be separated will be held back by the screen andthrown to the bottom or pocket C of the trap to be removed through theblow-ofl' cock D at the proper time without removing any of the parts.If by any means the screen should become clogged so that water will notpass freely from the compartment 1 'to the compartment and the pressurein the becomes sufiiciently high to unseat the relief valve G, the waterwill then pass to the second compartment through the opening 1) upon theunseating of therelief valve Gr.

The diaphragm K, as above stated, is so constructed and arranged thatthe sediment will be kept back from the valve so that the valve will bereadily unseated, and also the area of the diaphragm is such that therewill be a freeliow of water when the valve is unseated.

The trap C is so constructed that it can be readily removed from thecasing A for cleaning, repairing, or any other purpose.

While I have shown in the assembled con struction a screen consisting ofcircular perforations, Fig. 6, yet it is to be understood that I may usesuch a screen as shown in Fig. 7, or any other suitable screen. In somecases it may not be necessary to provide such a valve is to be'dispensed with the device may be simplified and constructed as shown inFig. 4 ofthe drawing.

As many changes could be made in the above construction and manyapparently widely different embodiments of my invention could be madewithout departing from the scope thereof, I intend that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a device of the class described, a casing having an inlet openingand an outlet opening and an opening to receive a trap, a wall in thecasing dividing said easing into an inlet and an outlet compartment,said wall having two openings therein one of outlet compartment throughthe opening in said wall, a' screen covering the opening in the'trap,and a relief valve normally closing the other opening in said wall.

2. In a device of the class described, a casing having an'inlet openingand an out-- let opening, a wall inside of the casing dividing the sameinto two compartments, two openings in said wall, a trap communicatingwith one of-said openings, said trap consisting of-a tube projectinginto one of the compartments and having an opening in the wall thereofwhich will permit free communication from one compartment to the otherthrough said opening in the wall, a screen covering the opening in'thetrap, a

diaphragm projecting from said wall, and a opening in the wall.

3. In a device of the class described, a casing having an inlet openingand an outlet opening, a wall inside of the casing dividing the sameinto two compartments, two openings in said wall, a trap communicatingwith one of said openings, said trap consisting of a tube projectinginto one of the compartments and having an opening in the H wall thereofwhich will permit free communication from one compartment to the I otherthrough said opening in the wall, a

.screen covering the openlng 1n the trap, a v

diaphragm projecting from the wall and having its greatest area adjacentto said wall, and a relief valve normally covering the other opening inthe wall.

i 4. In a device of the class described,- the combination with a casinghaving an inlet and in substantial alinement, of an inclined and anoutlet that are oppositely disposed partition wall interposed betweenthe inlet and outlet and having an opening therethrough and anotheropening in the lower wall of the casing in line with the partition wallopening, a trap pocketdetachably serured in the casing openingandtdepending from the casing, said pocket having an upper open mouthand a shoulder therein, an open ended tubular screen having its upperend abutted against the partition Wall and surrounding the openingtherethrough and its pending end oi. the pocket.

In witness whereof I have hereunto set lower end fitted into the mouthofthe poclret and abut-ted against the shoulder therein, and a draw-offcock carried by the lower demy hand at the city, county and State of NewYork, this 31st day of'March, 1908.

, FRANK E. PENDLETON. In presence of ALLAN W. Foosn, I. RICHARDS.

